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loss on both side. Pure tone average was 38.3 dB on right ear and 63.8 dB on left ear. The speech audiometry showed 100% (60 dB) on the right and 100% (100 dB) on the left. The Eustachian tube function were normal. Tympanoplasty was done on the right ear first and on the left ear half year after. The pure tone average improved to 20 dB on the right ear and 30 dB on the left ear. She used the hearing aid for the left ear before the operation, but not used it after the operation. It shows thedoi:10.1017/s0022215116007325 fatcat:djxjazbw3bc4ldo5dzd3kqplou